Question

8, 20, 50, ... Find the 10th term.

Answer 1

Answer:

$a_{10}=\frac{5^{10}}{2^7} -1$

Step-by-step explanation:

$a_{n}=a_1 . r^{n}-1$

Here

$r=\frac{5}{2}$

$a_1 =8$

For n=10 (tenth Term)

$a_{10}=8(\frac{5}{2})^{10} -1$

$a_{10}=\frac{5^{10}}{2^7} -1$